Account Locked

System report my account was locked when I log in at the internet cafe shop but I haven't do anything.After that I've try to unlock my account on the Battle net.System kept report safety answer not correct.

Battle net account: kaara13@yahoo.com.hkServer: AsiaLog in place: MacaoProblem: Account was locked when Log in at the internet cafe shopMy CD-KEY was COLLECTOR'S EDITIONContact Email: kaara13@yahoo.com.hkAccount recall to last online state before locked: I do